Skip the auto shop - Our mechanics make house calls

Q: I replace my ecm cranks once but won't start

asked by on

I replaced my ECM and now it cranks over once but won't start. Then if I was to try and start it for the 2nd time, it won't do anything. Not sure what it could be
My car has an automatic transmission.

Hi, thanks for writing in. There are a number of systems that your ECM controls. Be sure you are getting power to all of your critical components like fuel pump, injectors, coil packs, etc. Check to see if when cranking the car gets fuel. Do this by cranking it and then pulling a spark plug out to see if it is wet with fuel. Next check things like crank and cam sensors as these can cause the car to not produce a spark when not functioning properly as they contribute to proper timing.

If you would like help, consider having an expert automotive technician from YourMechanic come to your home or office to inspect and diagnose this issue for you, and make or suggest any repairs as needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car not starting just making a grinding noise. Everything powers on and I even tried to jump it and nothing

Hello, thank you for writing in. Due to the fact the belts are turning, it is apparent that the starter is at least attempting to turn over the engine. The starter may not be turning the engine fast enough for...

Q: 2003 camry ac circuit needs replacement

Hi There, Depending on what your mechanic was referring to with respect to the AC system, there are a number of possibilities that may cause problems within the A/C system. Several components make up the entire "A/C circuit." The locking...

Q: Car want start unless boosted, alternator good and battery good, while boosted the car crank in the key off position.

You should request a starter circuit diagnostic to get this resolved. If you want to attempt to diagnose it yourself, first perform a load test on the battery just to be sure that the battery is not an issue. If...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.